641435 has 4 divisors (see below), whose sum is σ = 769728. Its totient is φ = 513144.

The previous prime is 641419. The next prime is 641437. The reversal of 641435 is 534146.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641435 - 2⁴ = 641419 is a prime.

It is a super-2 number, since 2×641435² = 822877718450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641435.

It is not an unprimeable number, because it can be changed into a prime (641437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64139 + ... + 64148.

It is an arithmetic number, because the mean of its divisors is an integer number (192432).

2⁶⁴¹⁴³⁵ is an apocalyptic number.

641435 is a deficient number, since it is larger than the sum of its proper divisors (128293).

641435 is a wasteful number, since it uses less digits than its factorization.

641435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128292.

The product of its digits is 1440, while the sum is 23.

The square root of 641435 is about 800.8963728224. The cubic root of 641435 is about 86.2417481428.

The spelling of 641435 in words is "six hundred forty-one thousand, four hundred thirty-five".